Adoppler flow meter uses ultrasound waves to measure blood-flow speeds. suppose the device emits sound at 3.5 mhz, and the speed of sound in human tissue is about 1540 m/s. what is the expected beat frequency observed at the flow meter if blood is flowing in large leg arteries at 3.0 cm/s directly away from the flow meter?

Answervery cold;

Ithink the answer for this is: an electromagnet is a magnet  with a soft metal core.

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day